Allen Zderad, 68, lost his sight when he was diagnosed with a degenerative retinal disease. Due to his disease, Zderad has had vision problems for around 20 years. He was only able to see extremely bright light. Recently, scientists have developed a new kind of that enhance his vision glasses.

For the first time in over two decades, Zderad was able to see his wife

and their 10 grandchildren. The glasses consist of a prosthetic device that works by shooting light wave signals past his damaged retina that lead straight to the optic nerve. An ophthalmologist implanted a small chip into Zderad’s right eye at the Mayo Clinic in Rochester, Minnesota. However, he can’t see all the details but he can see shapes  can tell the difference between people. It has been proven that this technology worked for 14 different vision impaired people in the United States. Now he can walk through a crowd of people without a cane. But the best part about being able to see is that he can now see his wife.